Improvement in horse-powers



s. H. E'LWAR-D.

HORSE-POWER.

Patented Fe-b.1s,1877.

^ cross-girts D D1 D2.

NITED STATES N TENT ENCEa JOHN H..ELwAED, or sTQrAUL, MINNESOTA. y

ImgRovEmEn-r IN HoRsla-Powrns." l

Specification forming part of Letters Patent No. 187,366, dated February 13, 1877; application led January 19, 1877.

To all whom it may concern.-

Beit known that I, JOHN H. ELWARD, of St. Paul, county of Ramsey, State of Minnesota, have invented certain new and useful Improvements in Horse-Powers, of which the following is a full, clear, and exact descripA tion, reference being had to the accompanying drawings, making part of this specification.

Figure l is an elevation of my improved horse-power, taken from the end at which itis coupled with the shafting. Fig. 2 is a vertical longitudinal section of the same. Fig. 3 is a bottom-plan view of the brake device detached. Fig. 4 is an end view of a modification of the brake device. Fig. 5 is a side view of said modiiication, one of the brakearms being removed. Fig. 6 is a top-plan view of the bracket which supports the pinion that rotates the tumbling-rod.

My invention consists, first, in the peculiar construction and operation of a brake for horse-powers and, second, in providing a peculiar means for varying the speed of the connecting-shaft.

In the drawings, A A represent the groundwheels of a mounted horse-power, upon the axles B B. The frame of the horse-power consists of the beams or joists C O and the C' is a joist, supported by girts D2 D2, and provides a bearing for the center-pin E. F is the master-wheel, having a hub, F. f f are the sweeps, passing through brackets f1 on the rim of the master-wheel, and braced by means of arms or links f2. G Gr are rollers, upon which the rim of the master-wheel rests, and are supported by brackets g g. The master-wheel revolves upon the center-pin E, and rotates the wheels H H, which, in turn, actuate the main or line shaf't I by means of pinions H H. The inner end of shalt I has a bearing i'n the girt D1. K is a brake-wheel, keyed to the shaft l near its inner end, and rotating therewith.

L is a cross-head or crank-wheel, rigidly connected to the lower end of center-pin E. M M are brakearms,pivoted at their forward ends to the girt D1, one upon each side ofthe line-shaft I. At their other ends they are hinged to the cross-head L by links m m. m m' are friction-shoes upon the inner edge of brake-arms M, (shown in full line in Fig. 3 and dotted line in Fig. 2,) so situated that they can be forced against the brake-wheel K. El is a hand-wheel attached to the top of center-pin E, for rotating said pin. It Will be seen that When the pin E is rotated, the cross head L will draw the outer ends of arms M together, thus forcing the brakerubbers m m against the wheel K. Instead of a rotating hand-wheel and center-pin to actuate the brake-arms, construction of the nature of that shown in Figs. 4t and 5 may be employed. In those figures the master-wheel revolves around a sleeve or thimble, E2, through which the rod E3 passes vertically. The brake-arms N are pivoted to suitable supports, as at n, and 'carry at their forward ends the brakeshoe m. At the other end they are connected with rod E3 by a yoke, E4; or, if desired, chains may be employed in place of rod E2 and yoke E4. In this construction the brake is applied by pulling up the rod or chains attached to the brake-levers M. `Again, the brake-levers may be pivoted in such man- 'ner as to force the shoe against the brakewheel by the application of downward pressure upon them.

The outer end of the main or line shaft I projects beyond, and has a bearing upon, girt E2. Outside of the frame it carries a spurwheel, I1, meshing with a pinion, I2. Pinion I2 has a bearing in adjustable boxes i i, supported upon a bracket, I3, which is suspended from the main frame. The bottom part of bracket I3 is provided with a slot, 1,in which pinion I2 revolves, and two smaller slots, i2 i2, which allow the boxes tito be adjusted at diierent distances from the spur-wheel I1. If it is desired to increase the speed of the tumbling-shaft,pinion I2 can be removed, and a smaller one, such as pinion I, inserted nearer to wheel l1, and vice versa it' the speed is 4to be diminished. rEhe end of the shaft upon which the pinion I2 is mounted is, by preferf ence, squared to receive the usual tumblingrod connection.

Although the brakes are shown as being applied to the main shaft, yet it is apparent that they might be applied to the bevel-gears H, or other part of the driving mechanism, without departing from the spirit of my invention, which consists, essentially, in such a construction and arrangement of the parts that the brakes may be applied through the master-Wheel.

What 1 claim is- 1. In a horse-power, the combination, with y the line-shaft I, of 'the brake-WheelK, shoes m m', brake-arms M M, cross-head L, centerpin E, and connecting devices, substantially as set forth. A y

2. In a horse-power, the combination, with the lin'eshaft, of la mounting for the tumblingrod pinion, varranged to e'ei'v'e pinions of different diameters, as and for the purpose set forth. Y

In testimony whereofl I have hereunto set my hand this 28th day of December, A. D. 1876.

JOHN H. ELWARD. Witnesses:

H. J. CHAMBERS, G. RoosEN. 

